Abstract
The leakage of backfilling sand through corrosion holes of a quay wall is investigated using hydraulic experiments and numerical simulations. When the hole is located near the still water surface, experimental results show that the sand is leaked through the hole during the phase of wave trough and numerical results show that the water flows into the upper side and out of the lower side in the hole during the phase of wave trough. This result suggests that the sand leakage results from the seaward outflow in the hole. Furthermore, it is revealed that the sand leakage tends to occur for large seaward outflow velocity, suggesting that reducing the seaward outflow velocity in the hole is essential to prevent the sand leakage.
